Georgie, a singer and music vendor on the streets of Paris, teams with Zizi, a pickpocket, and in the scurry before a police raid she meets Tony, a young American artist. Returning his wallet the next day. Georgie is persuaded to remain and model for him, and as a result they fall in love. When war is declared, Tony enlists and Georgie keeps his apartment for him. While nursing in a large hospital in Paris, Georgie becomes pals with three "musketeers" of the Paris underworld; when Tony fails to meet her on his leave, she finds him in the arms of Suzanne, a cafe waitress; with her friends she monopolizes their attention with her musical talent. Later, Suzanne lures her from the apartment and has her imprisoned. Tony joins the friends in their search for her; and after a battle with the villains, the lovers are reunited.